Amplitude edge response characterization of interferometer ITF and the effect of defocus

Daniel Millstone; Matthew Dubin; Erick Ruiz

doi:10.1117/12.2569868

21 August 2020 Amplitude edge response characterization of interferometer ITF and the effect of defocus

Daniel Millstone, Matthew Dubin, Erick Ruiz

Proceedings Volume 11490, Interferometry XX; 114900V (2020) https://doi.org/10.1117/12.2569868
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

As the industry standard for interferometer frequency response specifications, ITF has historically been calculated using expensive phase targets to capture interference-based phase information. Recent work in transfer function characterization of interferometers has produced a more accessible technique with the ability to predict a system’s ITF utilizing a modified amplitude edge response. This technique does not require a phase measurement and demonstrates correlation between the ITF and an amplitude edge response for coherent systems, even in the presence of significant defocus. Defocused instruments exhibit modulation dropout in their transfer functions, now shown to be related to the Talbot Effect, exhibited here by imaging both phase and amplitude single frequency, square wave targets. This presentation outlines the modified amplitude edge response technique, utilization, and results for focused and defocused system characterization.

Conference Presentation

Citation Download Citation

Daniel Millstone, Matthew Dubin, and Erick Ruiz "Amplitude edge response characterization of interferometer ITF and the effect of defocus", Proc. SPIE 11490, Interferometry XX, 114900V (21 August 2020); https://doi.org/10.1117/12.2569868

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